This article from Live Science: http://www.livescience.com/46478-universe-should-have-collapsed.html
Universe Shouldn't Be Here, According to Higgs Physics
"So if the universe shouldn't exist, why is it here?
"The generic expectation is that there must be some new physics that we haven't put in our theories yet, because we haven't been able to discover them," Hogan said."
So, current knowledge of physics is not up to explaining how the universe began. That doesn't keep scientists from guessing. But we always knew that.
Universe Shouldn't Be Here, According to Higgs Physics
"So if the universe shouldn't exist, why is it here?
"The generic expectation is that there must be some new physics that we haven't put in our theories yet, because we haven't been able to discover them," Hogan said."
So, current knowledge of physics is not up to explaining how the universe began. That doesn't keep scientists from guessing. But we always knew that.